Join WebM file and WMA audio together Windows 10 64bit, WebM file format, What is .webm extension, WebM movie files consist of video streams compressed with the VP8 video codec and audio streams compressed with the Vorbis audio codec. The WebM file structure is based on the Matroska container. YouTube now offers WebM video format videos as part of its HTML5 player experiment, All uploaded files with resolutions from 720p and above are encoded to WebM in 480p and 720p, and other resolutions will follow…. Read More about Merge WebM Video And WMA Audio >>